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ext4: mballoc: refactor code inside DOUBLE_CHECK into separate function

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This patch implemets mb_group_bb_bitmap_alloc() and
mb_group_bb_bitmap_free() function to remove #ifdef DOUBLE_CHECK macro
and it's related code from inside
ext4_mb_add_groupinfo()/ext4_mb_release().

There should be no functionality change in this patch.

Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/8c2095d74b779f0254a19b24982490dc6f07c4f9.1589086800.git.riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Ritesh Harjani 2020-05-10 11:54:48 +05:30 committed by Theodore Ts'o
parent 4fca8f0779
commit a345021553
1 changed files with 33 additions and 17 deletions
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50
fs/ext4/mballoc.c
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@ -511,6 +511,26 @@ static void mb_cmp_bitmaps(struct ext4_buddy *e4b, void *bitmap)
}
}
static void mb_group_bb_bitmap_alloc(struct super_block *sb,
struct ext4_group_info *grp, ext4_group_t group)
{
struct buffer_head *bh;
grp->bb_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
BUG_ON(grp->bb_bitmap == NULL);
bh = ext4_read_block_bitmap(sb, group);
BUG_ON(IS_ERR_OR_NULL(bh));
memcpy(grp->bb_bitmap, bh->b_data, sb->s_blocksize);
put_bh(bh);
}
static void mb_group_bb_bitmap_free(struct ext4_group_info *grp)
{
kfree(grp->bb_bitmap);
}
#else
static inline void mb_free_blocks_double(struct inode *inode,
struct ext4_buddy *e4b, int first, int count)
@ -526,6 +546,17 @@ static inline void mb_cmp_bitmaps(struct ext4_buddy *e4b, void *bitmap)
{
return;
}
static inline void mb_group_bb_bitmap_alloc(struct super_block *sb,
struct ext4_group_info *grp, ext4_group_t group)
{
return;
}
static inline void mb_group_bb_bitmap_free(struct ext4_group_info *grp)
{
return;
}
#endif
#ifdef AGGRESSIVE_CHECK
@ -2456,20 +2487,7 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
meta_group_info[i]->bb_free_root = RB_ROOT;
meta_group_info[i]->bb_largest_free_order = -1; /* uninit */
#ifdef DOUBLE_CHECK
{
struct buffer_head *bh;
meta_group_info[i]->bb_bitmap =
kmalloc(sb->s_blocksize, GFP_NOFS);
BUG_ON(meta_group_info[i]->bb_bitmap == NULL);
bh = ext4_read_block_bitmap(sb, group);
BUG_ON(IS_ERR_OR_NULL(bh));
memcpy(meta_group_info[i]->bb_bitmap, bh->b_data,
sb->s_blocksize);
put_bh(bh);
}
#endif
mb_group_bb_bitmap_alloc(sb, meta_group_info[i], group);
return 0;
exit_group_info:
@ -2736,9 +2754,7 @@ int ext4_mb_release(struct super_block *sb)
for (i = 0; i < ngroups; i++) {
cond_resched();
grinfo = ext4_get_group_info(sb, i);
#ifdef DOUBLE_CHECK
kfree(grinfo->bb_bitmap);
#endif
mb_group_bb_bitmap_free(grinfo);
ext4_lock_group(sb, i);
ext4_mb_cleanup_pa(grinfo);
ext4_unlock_group(sb, i);